CA2699316A1 - Apparatus and method for calculating bandwidth extension data using a spectral tilt controlled framing - Google Patents
Apparatus and method for calculating bandwidth extension data using a spectral tilt controlled framing Download PDFInfo
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- CA2699316A1 CA2699316A1 CA2699316A CA2699316A CA2699316A1 CA 2699316 A1 CA2699316 A1 CA 2699316A1 CA 2699316 A CA2699316 A CA 2699316A CA 2699316 A CA2699316 A CA 2699316A CA 2699316 A1 CA2699316 A1 CA 2699316A1
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- spectral tilt
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- bandwidth extension
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- 230000003595 spectral effect Effects 0.000 title claims abstract 49
- 238000000034 method Methods 0.000 title claims 5
- 238000009432 framing Methods 0.000 title 1
- 230000005236 sound signal Effects 0.000 claims abstract 25
- 230000011664 signaling Effects 0.000 claims abstract 5
- 230000001052 transient effect Effects 0.000 claims 4
- 238000004590 computer program Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
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- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
An apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which a first spectral band is encoded with a first number of bits and a second spectral band different from the first spectral band is encoded with a second number of bits, the second number of bits being smaller than the first number of bits, has a controllable bandwidth extension parameter calculator (10) for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal. Each frame has a controllable start time instant.
The apparatus additionally comprises a spectral tilt detector (12) for detecting a spectral tilt in a time portion of the audio signal and for signaling the start time instant for the individual frames of the audio signal depending on spectral tilt.
The apparatus additionally comprises a spectral tilt detector (12) for detecting a spectral tilt in a time portion of the audio signal and for signaling the start time instant for the individual frames of the audio signal depending on spectral tilt.
Claims (19)
1. Apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which a first spectral band is encoded (340) with a first number of bits and a second spectral band different from the first spectral band is encoded (210) with a second number of bits, the second number of bits being smaller than the first number of bits, comprising:
a controllable bandwidth extension parameter calculator (10) for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal, wherein a frame has a controllable start time instant; and a spectral tilt detector (12) for detecting a spectral tilt in a time portion of the audio signal and for signalling the start time instant for the frame depending on the spectral tilt of the audio signal.
a controllable bandwidth extension parameter calculator (10) for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal, wherein a frame has a controllable start time instant; and a spectral tilt detector (12) for detecting a spectral tilt in a time portion of the audio signal and for signalling the start time instant for the frame depending on the spectral tilt of the audio signal.
2. Apparatus in accordance with claim 1, in which the spectral tilt detector (12) is configured to signal the start time instant of the frame, when a sign of a spectral tilt of the time portion of the audio signal is different from a sign of the spectral tilt of the audio signal in the preceding time portion of the audio signal.
3. Apparatus in accordance with claims 1 or 2, in which the spectral tilt detector (12) is operative to perform an LPC analysis of the time portion for estimating one or more low order LPC coefficients and to analyze the one or more low order LPC coefficients for determining, whether the portion of the audio signal has a positive or a negative spectral tilt.
4. Apparatus in accordance with claim 3, in which the spectral tilt detector (12) is operative to only calculate the first LPC coefficient and to not calculate additional LPC coefficients and to analyze a sign of the first LPC coefficient and to signal a start time instant of the frame depending on the sign of the first LPC
coefficient.
coefficient.
5. Apparatus in accordance with claim 4, in which the spectral tilt detector (12) is configured for determining the spectral tilt as a negative spectral tilt, in which a spectral energy decreases from lower frequencies to higher frequencies, when the first LPC
coefficient has a positive sign, and to detect the spectral tilt as a positive spectral tilt, in which the spectral energy increases from lower frequencies to higher frequencies, when the first LPC coefficient has a negative sign.
coefficient has a positive sign, and to detect the spectral tilt as a positive spectral tilt, in which the spectral energy increases from lower frequencies to higher frequencies, when the first LPC coefficient has a negative sign.
6. Apparatus in accordance with one of the preceding claims, in which the controllable bandwidth extension parameter calculator (10) is configured for calculating one or more of the following parameters for the frame:
spectral envelope parameters, noise parameters, inverse filtering parameters, or missing harmonics parameters.
spectral envelope parameters, noise parameters, inverse filtering parameters, or missing harmonics parameters.
7. Apparatus in accordance with one of the preceding claims, in which the controllable bandwidth extension parameter calculator (10) is configured for setting the start time instant of a frame depending on a start time instant of the time portion of the audio signal, on which the spectral tilt detection is based.
8. Apparatus in accordance with claim 7, in which the controllable bandwidth extension parameter calculator (10) is configured to set the start time instant of the frame identical to the start time instant of the time portion, in which the spectral tilt change has been detected.
9. Apparatus in accordance with one of the preceding claims, in which the controllable bandwidth extension parameter calculator (10) or the spectral tilt detector (12) are configured to process overlapping frames or time portions.
10. Apparatus in accordance with one of the preceding claims, in which the controllable bandwidth extension parameter calculator (10) is operative to set a stop time instant of a frame in response to the spectral tilt detector (12) or in response to an event independent on a spectral tilt of the audio signal.
11. Apparatus in accordance with claim 10, in which the event used by the controllable bandwidth extension parameter calculator (10) is the occurrence of a time instant being a fixed time period later in time than the start time instant.
12. Apparatus in accordance with one of the preceding claims, in which the controllable bandwidth extension parameter calculator (10) is configured for performing a frequency selective processing of the audio signal (320) in the second spectral band with a frequency resolution, and in which the spectral tilt detector (12) is operative to process the time portion in the time domain or in a frequency selective way with a frequency resolution being smaller than the frequency resolution used by the controllable bandwidth extension parameter calculator (10).
13. Apparatus in accordance with one of the preceding claims, further comprising:
a transient detector (14) for controlling the controllable bandwidth extension parameter calculator (10) to set the start time instant, when a transient is detected, wherein the controllable bandwidth extension parameter calculator is configured to set a start time instant, when either the spectral tilt detector (12) or the transient detector (14) has output a start time instant signal.
a transient detector (14) for controlling the controllable bandwidth extension parameter calculator (10) to set the start time instant, when a transient is detected, wherein the controllable bandwidth extension parameter calculator is configured to set a start time instant, when either the spectral tilt detector (12) or the transient detector (14) has output a start time instant signal.
14. Apparatus in accordance with one of the preceding claims, further comprising a speech/music detector (15), the speech/music detector being operative to activate the spectral tilt detector (12) in a speech portion of the audio signal and to deactivate the spectral tilt detector (12) in a music portion of the audio signal.
15. Apparatus in accordance with one of the preceding claims, in which the spectral tilt detector (12) is configured for determining, whether the time portion comprises a sibilant of a speech portion or a non-sibilant of a speech portion, wherein the spectral tilt detector (12) is configured to signal the start time instant for the frame, when a change from a non-sibilant to a sibilant is detected.
16. Apparatus in accordance with claim 13, in which the controllable bandwidth extension parameter calculator (10) is configured for applying the sequence of frames with a higher time resolution in response to a signalling from the spectral tilt detector (12) compared to a time resolution applied, when the controllable bandwidth extension parameter calculator (10) has received a signalling from the transient detector (14) in a time portion of the audio signal, for which the spectral tilt detector (12) has not signalled a start time instant.
17. Apparatus in accordance with claim 1, in which the spectral tilt detector (12) is configured to signal the start time instant of the frame, when a difference between a spectral tilt value of the time portion of the audio signal and a spectral tilt value of the audio signal in the preceding time portion of the audio signal is greater than a predetermined threshold value.
18. Method of calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which a first spectral band is encoded (340) with a first number of bits and a second spectral band different from the first spectral band is encoded (210) with a second number of bits, the second number of bits being smaller than the first number of bits, comprising:
calculating (10) bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal, wherein a frame has a controllable start time instant; and detecting (12) a spectral tilt in a time portion of the audio signal and signalling the start time instant for the frame depending on the spectral tilt of the audio signal.
calculating (10) bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal, wherein a frame has a controllable start time instant; and detecting (12) a spectral tilt in a time portion of the audio signal and signalling the start time instant for the frame depending on the spectral tilt of the audio signal.
19. Computer program having a program code for performing, when running on a computer, the method for calculating bandwidth extension data in accordance with claim 18.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7987108P | 2008-07-11 | 2008-07-11 | |
| US61/079,871 | 2008-07-11 | ||
| PCT/EP2009/004520 WO2010003543A1 (en) | 2008-07-11 | 2009-06-23 | Apparatus and method for calculating bandwidth extension data using a spectral tilt controlling framing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2699316A1 true CA2699316A1 (en) | 2010-01-14 |
| CA2699316C CA2699316C (en) | 2014-03-18 |
Family
ID=40929509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2699316A Active CA2699316C (en) | 2008-07-11 | 2009-06-23 | Apparatus and method for calculating bandwidth extension data using a spectral tilt controlled framing |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US8788276B2 (en) |
| EP (1) | EP2176862B1 (en) |
| JP (1) | JP5010743B2 (en) |
| KR (1) | KR101182258B1 (en) |
| CN (1) | CN101836253B (en) |
| AR (1) | AR072703A1 (en) |
| AT (1) | ATE522901T1 (en) |
| AU (1) | AU2009267529B2 (en) |
| BR (1) | BRPI0904958B1 (en) |
| CA (1) | CA2699316C (en) |
| ES (1) | ES2372014T3 (en) |
| HK (1) | HK1142432A1 (en) |
| IL (1) | IL203928A (en) |
| MY (1) | MY150373A (en) |
| PL (1) | PL2176862T3 (en) |
| RU (1) | RU2443028C2 (en) |
| TW (1) | TWI457914B (en) |
| WO (1) | WO2010003543A1 (en) |
| ZA (1) | ZA201000941B (en) |
Families Citing this family (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7711123B2 (en) * | 2001-04-13 | 2010-05-04 | Dolby Laboratories Licensing Corporation | Segmenting audio signals into auditory events |
| RU2452044C1 (en) | 2009-04-02 | 2012-05-27 | Фраунхофер-Гезелльшафт цур Фёрдерунг дер ангевандтен Форшунг Е.Ф. | Apparatus, method and media with programme code for generating representation of bandwidth-extended signal on basis of input signal representation using combination of harmonic bandwidth-extension and non-harmonic bandwidth-extension |
| US9247547B2 (en) * | 2009-10-15 | 2016-01-26 | Qualcomm Incorporated | Downlink and uplink resource element mapping for carrier extension |
| EP2360688B1 (en) * | 2009-10-21 | 2018-12-05 | Panasonic Intellectual Property Corporation of America | Apparatus, method and program for audio signal processing |
| CA3166284C (en) | 2010-01-19 | 2023-07-18 | Dolby International Ab | Improved subband block based harmonic transposition |
| EP2362376A3 (en) * | 2010-02-26 | 2011-11-02 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Apparatus and method for modifying an audio signal using envelope shaping |
| WO2011110494A1 (en) | 2010-03-09 | 2011-09-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Improved magnitude response and temporal alignment in phase vocoder based bandwidth extension for audio signals |
| CA2792452C (en) | 2010-03-09 | 2018-01-16 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for processing an input audio signal using cascaded filterbanks |
| US9319645B2 (en) * | 2010-07-05 | 2016-04-19 | Nippon Telegraph And Telephone Corporation | Encoding method, decoding method, encoding device, decoding device, and recording medium for a plurality of samples |
| US9047875B2 (en) | 2010-07-19 | 2015-06-02 | Futurewei Technologies, Inc. | Spectrum flatness control for bandwidth extension |
| CN102436820B (en) | 2010-09-29 | 2013-08-28 | 华为技术有限公司 | High frequency band signal coding and decoding methods and devices |
| CN102419977B (en) * | 2011-01-14 | 2013-10-02 | 展讯通信（上海）有限公司 | Method for discriminating transient audio signals |
| CN102629470B (en) * | 2011-02-02 | 2015-05-20 | Jvc建伍株式会社 | Consonant-segment detection apparatus and consonant-segment detection method |
| CN103548077B (en) | 2011-05-19 | 2016-02-10 | 杜比实验室特许公司 | The evidence obtaining of parametric audio coding and decoding scheme detects |
| JP5807453B2 (en) * | 2011-08-30 | 2015-11-10 | 富士通株式会社 | Encoding method, encoding apparatus, and encoding program |
| CN103035248B (en) * | 2011-10-08 | 2015-01-21 | 华为技术有限公司 | Encoding method and device for audio signals |
| ES2549953T3 (en) * | 2012-08-27 | 2015-11-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for the reproduction of an audio signal, apparatus and method for the generation of an encoded audio signal, computer program and encoded audio signal |
| EP2709106A1 (en) * | 2012-09-17 | 2014-03-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating a bandwidth extended signal from a bandwidth limited audio signal |
| BR122020007932B1 (en) | 2013-01-21 | 2022-09-27 | Dolby International Ab | AUDIO PROCESSING DEVICE AND METHOD TO DECODE ONE OR MORE FRAMES OF AN ENCODED AUDIO BIT STREAM |
| PL3121813T3 (en) | 2013-01-29 | 2020-08-10 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Noise filling without side information for celp-like coders |
| MX348916B (en) | 2013-01-29 | 2017-07-04 | Fraunhofer Ges Forschung | Audio encoders, audio decoders, systems, methods and computer programs using an increased temporal resolution in temporal proximity of onsets or offsets of fricatives or affricates. |
| MX347316B (en) | 2013-01-29 | 2017-04-21 | Fraunhofer Ges Forschung | Apparatus and method for synthesizing an audio signal, decoder, encoder, system and computer program. |
| MY172710A (en) | 2013-01-29 | 2019-12-11 | Fraunhofer Ges Forschung | Apparatus and method for generating a frequency enhancement signal using an energy limitation operation |
| AR094845A1 (en) | 2013-02-20 | 2015-09-02 | Fraunhofer Ges Forschung | APPARATUS AND METHOD FOR CODING OR DECODING AN AUDIO SIGNAL USING A SUPERPOSITION DEPENDING ON THE LOCATION OF A TRANSITORY |
| US9842598B2 (en) * | 2013-02-21 | 2017-12-12 | Qualcomm Incorporated | Systems and methods for mitigating potential frame instability |
| CN110265047B (en) | 2013-04-05 | 2021-05-18 | 杜比国际公司 | Audio signal decoding method, audio signal decoder, audio signal medium, and audio signal encoding method |
| CN105431902B (en) | 2013-06-10 | 2020-03-31 | 弗朗霍夫应用科学研究促进协会 | Apparatus and method for audio signal envelope encoding, processing and decoding |
| MY170179A (en) * | 2013-06-10 | 2019-07-09 | Fraunhofer Ges Forschung | Apparatus and method for audio signal envelope encoding, processing and decoding by splitting the audio signal envelope employing distribution quantization and coding |
| EP2830054A1 (en) | 2013-07-22 | 2015-01-28 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio encoder, audio decoder and related methods using two-channel processing within an intelligent gap filling framework |
| TWI557726B (en) * | 2013-08-29 | 2016-11-11 | 杜比國際公司 | System and method for determining a master scale factor band table for a highband signal of an audio signal |
| CN104517610B (en) * | 2013-09-26 | 2018-03-06 | 华为技术有限公司 | The method and device of bandspreading |
| EP3058567B1 (en) * | 2013-10-18 | 2017-06-07 | Telefonaktiebolaget LM Ericsson (publ) | Coding of spectral peak positions |
| US9640185B2 (en) * | 2013-12-12 | 2017-05-02 | Motorola Solutions, Inc. | Method and apparatus for enhancing the modulation index of speech sounds passed through a digital vocoder |
| US9542955B2 (en) * | 2014-03-31 | 2017-01-10 | Qualcomm Incorporated | High-band signal coding using multiple sub-bands |
| CN105225670B (en) * | 2014-06-27 | 2016-12-28 | 华为技术有限公司 | A kind of audio coding method and device |
| US9837089B2 (en) * | 2015-06-18 | 2017-12-05 | Qualcomm Incorporated | High-band signal generation |
| US10847170B2 (en) | 2015-06-18 | 2020-11-24 | Qualcomm Incorporated | Device and method for generating a high-band signal from non-linearly processed sub-ranges |
| JP6705142B2 (en) * | 2015-09-17 | 2020-06-03 | ヤマハ株式会社 | Sound quality determination device and program |
| RU2714365C1 (en) * | 2016-03-07 | 2020-02-14 | Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. | Hybrid masking method: combined masking of packet loss in frequency and time domain in audio codecs |
| EP3382702A1 (en) | 2017-03-31 | 2018-10-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for determining a predetermined characteristic related to an artificial bandwidth limitation processing of an audio signal |
| US10825467B2 (en) * | 2017-04-21 | 2020-11-03 | Qualcomm Incorporated | Non-harmonic speech detection and bandwidth extension in a multi-source environment |
| TWI652597B (en) * | 2017-12-05 | 2019-03-01 | 緯創資通股份有限公司 | Electronic device and unlocking method thereof |
| JP6962386B2 (en) * | 2018-01-17 | 2021-11-05 | 日本電信電話株式会社 | Decoding device, coding device, these methods and programs |
| EP3671741A1 (en) * | 2018-12-21 | 2020-06-24 | FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V. | Audio processor and method for generating a frequency-enhanced audio signal using pulse processing |
| CN112151046B (en) * | 2020-09-25 | 2024-06-18 | 北京百瑞互联技术股份有限公司 | Method, device and medium for adaptively adjusting multi-channel transmission code rate of LC3 encoder |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100261254B1 (en) * | 1997-04-02 | 2000-07-01 | 윤종용 | Scalable audio data encoding/decoding method and apparatus |
| DE19736669C1 (en) * | 1997-08-22 | 1998-10-22 | Fraunhofer Ges Forschung | Beat detection method for time discrete audio signal |
| US6233550B1 (en) * | 1997-08-29 | 2001-05-15 | The Regents Of The University Of California | Method and apparatus for hybrid coding of speech at 4kbps |
| CA2252170A1 (en) * | 1998-10-27 | 2000-04-27 | Bruno Bessette | A method and device for high quality coding of wideband speech and audio signals |
| SE9903552D0 (en) * | 1999-01-27 | 1999-10-01 | Lars Liljeryd | Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching |
| US7010480B2 (en) * | 2000-09-15 | 2006-03-07 | Mindspeed Technologies, Inc. | Controlling a weighting filter based on the spectral content of a speech signal |
| US6615169B1 (en) * | 2000-10-18 | 2003-09-02 | Nokia Corporation | High frequency enhancement layer coding in wideband speech codec |
| DE60214027T2 (en) * | 2001-11-14 | 2007-02-15 | Matsushita Electric Industrial Co., Ltd., Kadoma | CODING DEVICE AND DECODING DEVICE |
| EP1527442B1 (en) | 2002-08-01 | 2006-04-05 | Matsushita Electric Industrial Co., Ltd. | Audio decoding apparatus and audio decoding method based on spectral band replication |
| WO2004084179A2 (en) * | 2003-03-15 | 2004-09-30 | Mindspeed Technologies, Inc. | Adaptive correlation window for open-loop pitch |
| ATE471557T1 (en) | 2003-10-23 | 2010-07-15 | Panasonic Corp | SPECTRUM CODING DEVICE, SPECTRUM DECODING DEVICE, TRANSMISSION DEVICE FOR ACOUSTIC SIGNALS, RECEIVING DEVICE FOR ACOUSTIC SIGNALS AND METHOD THEREOF |
| JP2006023658A (en) | 2004-07-09 | 2006-01-26 | Matsushita Electric Ind Co Ltd | Audio signal encoding apparatus and audio signal encoding method |
| SG163555A1 (en) | 2005-04-01 | 2010-08-30 | Qualcomm Inc | Systems, methods, and apparatus for highband burst suppression |
| TWI271703B (en) | 2005-07-22 | 2007-01-21 | Pixart Imaging Inc | Audio encoder and method thereof |
| JP2007333785A (en) | 2006-06-12 | 2007-12-27 | Matsushita Electric Ind Co Ltd | Audio signal encoding device and audio signal encoding method |
| US8260609B2 (en) * | 2006-07-31 | 2012-09-04 | Qualcomm Incorporated | Systems, methods, and apparatus for wideband encoding and decoding of inactive frames |
| TWI308740B (en) | 2007-01-23 | 2009-04-11 | Ind Tech Res Inst | Method of a voice signal processing |
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| EP2176862A1 (en) | 2010-04-21 |
| ATE522901T1 (en) | 2011-09-15 |
| KR101182258B1 (en) | 2012-09-14 |
| AU2009267529B2 (en) | 2011-03-03 |
| BRPI0904958B1 (en) | 2020-03-03 |
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| RU2010109206A (en) | 2011-09-20 |
| RU2443028C2 (en) | 2012-02-20 |
| WO2010003543A1 (en) | 2010-01-14 |
| CN101836253A (en) | 2010-09-15 |
| EP2176862B1 (en) | 2011-08-31 |
| JP2011501225A (en) | 2011-01-06 |
| US8788276B2 (en) | 2014-07-22 |
| TW201007709A (en) | 2010-02-16 |
| IL203928A (en) | 2013-06-27 |
| PL2176862T3 (en) | 2012-03-30 |
| AU2009267529A1 (en) | 2010-01-14 |
| ZA201000941B (en) | 2011-04-28 |
| BRPI0904958A2 (en) | 2015-06-30 |
| US20110099018A1 (en) | 2011-04-28 |
| KR20100083135A (en) | 2010-07-21 |
| MY150373A (en) | 2013-12-31 |
| JP5010743B2 (en) | 2012-08-29 |
| HK1142432A1 (en) | 2010-12-03 |
| AR072703A1 (en) | 2010-09-15 |
| CN101836253B (en) | 2012-06-13 |
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